RE: Long-running SQL

Hi Cherie,
do you know for sure it is using the index? Have you traced it? Can you post the explain plan? What's the cardinality of account_number in this table?

I can just hear those people over there screaming at you saying it's your problem...

Lisa Koivu
Oracle Database Administrator
Fairfield Resorts, Inc.
954-935-4117

> -----Original Message-----
> From: Cherie_Machler_at_gelco.com [SMTP:Cherie_Machler_at_gelco.com]
> Sent: Wednesday, March 27, 2002 9:33 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Long-running SQL
>
>
> We have a statement that I feel takes too long to run in a nightly data
> load.
> The table it runs against has 386,000 records. It runs for about 10
> seconds
> on average. We're only loading about 50,000 records a night but this
> statement
> is running during the majority of the 9-hour load time. This is causing
> the
> load to run longer than our allowable window and causing me untold
> headaches.
> If anyone has any suggestions to make this run faster, I'd be greatly
> appreciative.
>
> The columns in the where statement are all part of an index. However,
> the functions on the columns add additional execution time and complexity.
>
> This is an 8.0.4 database so I can not make this a function-based index.
>
> I put this in a couple of SQL tuning tools and came up with no valid
> alternatives.
> I can't help thinking that the statement could be rewritten into a couple
> of statements
> so that it would be more efficient. However, I'm not skilled enough with
> SQL to
> do it. Perhaps someone else is. Here's the code.
>
> SELECT /*+ INDEX(EXP_COST_CENTER_DIM EXP_COST_CENTER_DIM_IDX1) + */
> EXP_COST_CENTER_KEY
> FROM EXP_COST_CENTER_DIM
>
> WHERE ACCOUNT_NUMBER = :b1 AND
> NVL(ORG_LEVEL_1_VALUE,'NONE') = NVL(:b2,'NONE') AND
> NVL(ORG_LEVEL_2_VALUE,'NONE') = NVL(:b3,'NONE') AND
> NVL(ORG_LEVEL_3_VALUE,'NONE') = NVL(:b4,'NONE') AND
> NVL(ORG_LEVEL_4_VALUE,'NONE') = NVL(:b5,'NONE') AND
> NVL(ORG_LEVEL_5_VALUE,'NONE') = NVL(:b6,'NONE') AND
> NVL(ORG_LEVEL_6_VALUE,'NONE') = NVL(:b7,'NONE') AND
> NVL(ORG_LEVEL_7_VALUE,'NONE') = NVL(:b8,'NONE') AND
> NVL(ORG_LEVEL_8_VALUE,'NONE') = NVL(:b9,'NONE') AND
> ROWNUM = 1
>
>
> SQL> desc exp_cost_center_dim
> Name Null? Type
> ------------------------------- -------- ----
> EXP_COST_CENTER_KEY NOT NULL NUMBER(7)
> ACCOUNT_NUMBER NOT NULL NUMBER(9)
> BATCH_WINDOW_DATE_KEY NOT NULL NUMBER(5)
> ORG_LEVEL_1_VALUE VARCHAR2(20)
> ORG_LEVEL_2_VALUE VARCHAR2(20)
> ORG_LEVEL_3_VALUE VARCHAR2(20)
> ORG_LEVEL_4_VALUE VARCHAR2(20)
> ORG_LEVEL_5_VALUE VARCHAR2(20)
> ORG_LEVEL_6_VALUE VARCHAR2(20)
> ORG_LEVEL_7_VALUE VARCHAR2(20)
> ORG_LEVEL_8_VALUE VARCHAR2(20)
> DATA_SOURCE_MOD_DATETIME NOT NULL DATE
> DATA_WAREHOUSE_MOD_DATETIME NOT NULL DATE
> DATA_MART_MOD_DATETIME NOT NULL DATE
>
>
> SQL> select column_name from dba_ind_columns where index_name
> ='EXP_COST_CENTER_D
> IM_IDX1';
>
> COLUMN_NAME
> --------------------------------------------------------------------------
> ------
> ACCOUNT_NUMBER
> ORG_LEVEL_1_VALUE
> ORG_LEVEL_2_VALUE
> ORG_LEVEL_3_VALUE
> ORG_LEVEL_4_VALUE
> ORG_LEVEL_5_VALUE
> ORG_LEVEL_6_VALUE
> ORG_LEVEL_7_VALUE
> ORG_LEVEL_8_VALUE
>
>
> SQL> select column_name from dba_ind_columns where index_name
> ='EXP_COST_CENTER_D
> IM_PK';
>
> COLUMN_NAME
> --------------------------------------------------------------------------
> ------
> EXP_COST_CENTER_KEY
>
>
>
>
> Thanks,
>
> Cherie Machler
> Oracle DBA
> Gelco Information Network
>
>
>
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> Author:
> INET: Cherie_Machler_at_gelco.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Koivu, Lisa
  INET: lisa.koivu_at_efairfield.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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